Given that, a sphere has a surface area of about 999 square millimeters. 
Formula to find the surface area of sphere is, 
S= 4πr² Where r = radius of the sphere and S= surface area. 
Given S= 999 square millimeters.
So, we can write:
4πr² = 999
4 * 3.14 * r² = 999 Since, π = 3.14
12.56 *r² = 999 
 Divide each sides by 12.56.
 Divide each sides by 12.56.
 r² = 79.53821656
r = √79.53821656 Taking square root to each sides of equation.
r = 8.918420071
So, r = 8.918 Rounded to nearest thousandth.
So, radius of the sphere is 8.918 millimeters.
Hope this helps you!
 
        
             
        
        
        
Answer:
181 
Step-by-step explanation:
To find how many hours they work per month multiply the amount of hours they work each day by the amount of days they work in a month:
 
 
They work  hours per month.
 hours per month.
Hope this helps :)
 
        
                    
             
        
        
        
Answer:

Step-by-step explanation:
We want to find the equation of the line that goes through: !6,-10) and is perpendicular to the line

Let's simplify the equation of the line to get:


The slope of this line is -5.
The perpendicular to this line has a slope of 

The equation going through (6,-10) is 

We substitute to get;

Expand;


 
        
             
        
        
        
Answer:
25,200in²
Step-by-step explanation:
The architect wants to draw a room that has an area of 175 ft². We need to find this measurement in square inches. 
<u>Square feet and square inches are different from feet and inches. </u>
We should know that a square foot is 144 square inches. 
Multiply 175 * 144.

So the same architect wants to draw a room that should have an area of 25,200in².
<em>Brainilest Appreciated. </em>